Telephonograph and like instrument



April 8., 1924,

. R. HAsE TELEPHoNoGRApH AND LIKE INSTRUMENT Filed July so. 1921 @Genfer Patented Apr. 8, 192,4.

v UNITED STATES IBUDOLIEl HASE, OF HANNOVER, GERMANY,. ASSIGNOB TO THE FIRM.' NAAMLOOZE VEN- NOOTSCHAP FINANZIEELE MAATSCHAPPIJ DRIEBEBGEN, OF AMSTERDAM, N ETHERLANDB, .L COMPANY 0F THE TELEPHONOGRAPE AN D LIKE INSTRUMENT. 1

,Application lcd Iuly 30, 1921. Serial No. 488,781.

To all whom it may c'cem.'

Be it known that I, RUDOLF Hasn, a citizen of the German Republic, engineer, residing at Josephstrasse 26, Hannover, Ger- 5 many, have mvented new and useful Imrovements in Telephonographs and like A nstruments, of which the following is a specification.

This invention relates to telephonof'raih's l0 and like instruments wherein two cyv in ers vare employed, the one being automatically brought into action upon thev completion of the record upon the other. The chief purpose of the invention is to l5 improve the junction between the records upon the two cylinders. To this end the invention makes provision for each cylinder to be automatically brought up to sed before the other is put out of action. -a

20 preferred construction the records are made actually to overlap a little, for which purpose the one cylinder is ut into action beore the other is switche off.

In a preferred embodiment of the inven- 'sl tion the moving slide carryin the sound box of the instrument is ca a plurality of electrical contacts sion at a predetermined. time interval. By its first contact'operation the moving part a0 s ets in motion the cylinder theretofore ata- .t1onary; and by a su sequent contact o ration it interrupts the drive of the cyhnder which was first inrotation.

The invention 'further includes a system to" operate Y33 of connections including a relay and contacts operated thereby which 'govern both the circuit of an electric drivmg motor and also :he circuit of the sound box of e appara- 4o By way of example a construction according to the invention is illustrated diagrammatically in plan in Fig. 1 and itselectrical connections are shown 1n Fig. 2.

In this embodiment of the invention the Du u apparatus consists of two comdpletely similar.

parts. Eaehincludes a cylin er A, A with Aan inscribing sound box B, B" and. a ref reducing sound box which is not shown. Both boxes' of'each portion of the appara-A e0 tus are carriedby a slide. C, C' which is in succes- 'are relays appropriated to the halves of the apparatus and each o them.

traversed upon rods D, D parallel Vto the axis of its cylinder by a drivin motor, also not shown. Upon'each part o? the apparatus are press buttons E, F and E', F respectively, controlling circuits as hereinafter explained with reference to Fig. 2; and for each part of the apparatus there is also provided a hand operated switch G, G. Depression of the press button E orE closes the respective circuit, andA depression of the press button F or F opens the circuit. Each of the switches G- and G is included 1n the circuit of an electromotor driving that part of the apparatus to which the switchI belongs, and the switches are ofsuch con'- structlon as to return automatically to open circuit position after they have been closed and released. v

Upon each of the slides C, C on that side of it which travels foremost in the operative traverse .of the slide are arrangedv two pins H, J, H', J respectively. These are adapted t operate one after the other u n tw o contacts in end blocks K, K. indicated, the pins H, J are made of di'erent length for this p v The method ofv operation may be c xplained by reference to the diagram of Fig. 2.V In this diagram 1, 1 indicate the contacts which are closed vby depression of the pre buttons E, E respectively and which are o ned by depression of press buttons switches yG and arel shown. at 2 and 2,

tively. TheV driving motors for the cylinders A and A areindicated in the diagram at L and L respectively. M, M

has two contacts 5, 6, 5', 6', which are closed when the relay 1s' excited. The contacts o rated by the pins in the slide C, C are own -at 3and 4 and 3 and 4 respectively. ring the travel of the sound box, 3 or 3' is closed while 4 or 4' isopened.. t

Whenthe telephonograph is to be put into action both pre buttons'E, E are derespectivel ',The contacts of the' vtive p so as-to closeoontacts 1 and 1'.v

Also oneof the' two switches G,G is closed, so as to close, say, contact2. Consequently current flows over the circuit, positive pole 7 of the mains, relay M, switch 2, motor L, contact 1, contact 3, to the negative pole 8 of the mains. Motor L starts up and relay M is excited and closes its contacts 5 and 6. Contact 5 is in parallel withL contact 2 and therefore maintains the lcircult of the motor L closed when the switch G is released and returns to its open circuit position. The

closing of contact 6 completes the circuit of' the sound box B shown in dotted lines, said circuit ending at terminals 9, 10 which may be supposed connected, for instance, to a thermionic Valve or other amplifying device. The sound box B, therefore, begins to inscribe the conversation in cylinder A. U n the sound lbox slide C nearin the en of its traverse, its pin H first c oses the contact 4 so as to establish a circuit as follows:y 7, M', 4, L', 1, 3, 8. The motor L therefore starts up and relay M closes its two contacts 5', 6', the latter of which completes the circuit of sound box B.

For a certain length of time, therefore,

both parts of the apparatus are in actionv together and the conversation is recorded in, or reproduced from, both record carriers A. and A.

At the end of the traverse, however, the pin J of the slide C opens contact 3 which breaks the circuit of motor L and relay M.

The contacts 5, 6 of the latter therefore open, so breaking the circuit of sound box B. The second half of the apparatus is then alone in operation.

The cylinder A can now be removed and i 'replaced by another and slide C can be returned' to its initial position. ment of it closes contact 3 and opens contact- 4. Initially the circuit of relay M and motor L was completedover contact 4; but upon excitation of relay M' its contact 5', which is in parallel with contact 4, was closed and the motorand exciting-circuit therefore remains completed over this contact.

It will be clear from this description and the diagram of connections that it is immaterial which of the two parts of the apparatus is first put in action.

The invention is not restricted to the details of construction described and illustrated since these may be varied without affecting the substance of the invention.

What I claim is:

1. In a sound recordin and reproducin instrument, the combination of two recor carriers, a member traversing one of said record carriers, means foi-driving each of said carriers and ysaid member, means operated by said member near the end of its traverse for setting the other carrier in motion, and means operated by said member on reaching the endof its traverse for stopping the carrier it has traversed.

Such move- 2. In a telephonograph the combination of two cylinders, a sound box co-actin with each cylinder, means for rotating eac cylinder and traversing its sound box along it, means automatically actuated b yeach sound box" before reaching the end o its traverse for starting the other cylinder` and its sound box, and means automatically actuated by each sound box on reaching the end of its traverse for stopping its cylinder-and putting itself out of action.

3. In a telephonograph, the combination of two cylinders, a sound box for each c linder, an electric motor for each cylin er and connections between said motor and its cylinder and sound box whereby the cylinder may be rotated and the' sound box traversed over it, a sourceof power, a contact closed by the sound -box of one cylinder near the end of its traverse'completing a circuit for the motor of the other cylinder from said source of power, and a contact opened by said soundbox on reaching the end of its traverse breaking the circuit of the motor driving it.

4. In a telephonograph, the combination of two cylinders, a sound box for each cylinder, an electric motor for eachl cylin er and connections between said motor and its cylinder and sound box whereby the cylinder may be rotated and the sound box trav-` ersed over' it, a source of power, two contacts in thecircuit of each motor completing its connection to said source of power, one of said contacts lying in the path of the sound box driven by said motor and adapted to be opened thereby at the end of its traverse, and the other lying in the path of the other sound box and adapted to be i closed thereby before it reaches the end of its traverse.

5. In a sound recording and reproducln instrument, the combination. of two recor carriers, a sound box for each record carrier co-operating therewith, a motor for each carrler driving said carrier and traversingv second contact in parallel with each switch closed by the o eration of the motor not associated with t at switch prior to the completion of the traverse of the sound box driven by that motor.

6. A telephonograph comprising two parts, each part inc uding' a cylinder, a sound box, an electric motor driving said cylinder and traversing said sound box a ong it, a relayfa bandi-'operated switch, and connections` between said switch, motor and .relay whereby the closing of the switch traverse, and another contact operated by completes a circult through said motor and ,said relay and controlling the circuit of the relay, a contact in parallel with said switch' sound box. li

closed by said relay upon its excitation, a In testimony whereof I have signed my 5 second contact in parallel with said switch name to this specification.

closed by the sound box of the *other art 4 of the lephonograph hearth@ and o a; t RUDOLF HASE. 

